package com.zzw.hj66;

import java.util.Scanner;

/**
 * @Project: hw_java
 * @Description: 配置文件恢复
 * @Author: zzw
 */
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String[] cmds1 = new String[]{"reset", "reset", "board", "board", "reboot", "backplane"};
        String[] cmds2 = new String[]{" ", "board", "add", "delete", "backplane", "abort"};
        String[] operations = new String[]{"reset what", "board fault",
                "where to add", "no board at all", "impossible", "install first"
        };
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String[] str = in.nextLine().split(" ");

            String cmd1 = str[0], cmd2 = str.length == 1 ? " " : str[1];

            int count = 0, res_idx = -1;
            for (int idx = 0; idx < 6; idx++) {
                if (cmds1[idx].startsWith(cmd1) && cmds2[idx].startsWith(cmd2)) {
                    count++;
                    if (count > 1) {
                        System.out.println("unknown command");
                        break;
                    }
                    res_idx = idx;
                }
            }
            if (count == 0) System.out.println("unknown command");
            if (count == 1) System.out.println(operations[res_idx]);
        }
    }
}